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Pb22Cu4(Bi,Sb)30S69 Empiricial: Pb22Cu4Bi25Sb5S69 A gray, fibrous, metallic mineral, a sulphide of antimony, bismuth, and lead. Named after Wolfgang Franz von Kobell (1803-1882), German mineralogist. (Cu,Fe)2Pb12(Bi,Sb)14S35 |